Detachable pipe-coupling.



P. M. GASE. I DETAGHABLE PIPE COUPLING. APPLICATION FILED JUNE 23, 1911.

1,005,153. Patented Oct. 10, 1911.

v 55115 3mm llNTTED STATE$ PATENT OFFlCE. p

FRANCIS MILLS CASE, OF CLEVELAND, OHIO, ASSIGNOR TO THE HOOVER SUCTION SWEEPER COMPANY, OF NEW BERLIN, OI IIQ, A CQRPORATION OF OHIO.

DETACHABLE PIPE-COUPLING.

I Specification of Letters Patent.

Application filed. June 23, 1911. Serial No. 634,968.

)i 3e cou )lin 's in which the ants are ada )t-- b ed to be readily and quickly connected and disconnected, the device being especially adapted for use as a coupling for air pipes used in connection with pneumatiosweepers and cleaners now commonly employed in the cleaning of carpets, rugs, draperies and the like, although the invention maybe used to considerable advantage in many other devices and for many kinds of pipes.

The object of the improvement is to pro vide a detachable pipe coupling which will be simple in construction, cheaply manufacturcd and very convenient in use while at the same time forming a substantial, tight and suiticientlysrigid joint between the pipes coupled. These objects, together with other objects readily apparent to'those skilled in the art, I attain by the construction illustrated in the accompanying drawings, although my invent-ion is capable ofembodiment in other forms, the construction illustrated being chosen by way of example.

In the drawings. Figure 1 is a perspective View of a pneumatic cleaner nozzle oonnect-' ed to a pipe by means of an intermediate elbow and two couplings embodying my 111- VGIIElOIL Fig. 2' is an enlarged perspective view of the same parts as illustrated in Fig.

lit

1, the nozzle, elbow and pipe being separated from each other to more fully illustrate the construction and a portion of the nozzle be I ing broken away. Fig. 3 is a longitudinal section "through a coupling embodying iny invention, the parts being separated or detached. Fig, 4 is a longitudinal section through a coupling embodying my invention showing the. parts connected. Fig. .5 is a transverse section through a coupling em bodying my invention, said figure being taken on a plane indicated by the line 5-5 in Fig. 4. v r

Throughout the several views similar reference numerals indicate similar parts The numeral 1 indicates a pneumatic cleaning nozzle'which, in so far as its con stru otion and function as a nozzle is concerned, forms no part of the present invention, said nozzle being illustrated to show,

one of the practical and important uses of my invention.

The numeral 2 indicates an elbow intermediate the nozzle 1 and pipe 3 to which the nozzle is connected.

The joints between the nozzle 1 and elbow 2 and between the elbow 2 and pipe 3 are" indicated by the numerals 4: and '5, respectively.

.In Fig. 2 the pipe is shown disconnected Patented Oct. 10, 1911.

from the elbow 2 and the elbow 2 isshown j partly disconnected from the nozzle 1. It will be noted that the pipe 3 is provided with a projecting, internal, split, spring collar 6 and that the elbow 2 is likewise provided with a projecting, internal, split, spring col lar 6. The collar forms an important part of the invention as hereinafter will more fully appear. It will be understood that the elbow and nozzle in the drawings are shown only by way of illustrating one use of the device and that the portion of said elbow and said nozzle into whlch the spring collar enters may, in general, be called the receiving member of the coupling, whether the couphng be for elbows, nozzles or pipes.

Referring now more particularly to Figs.

3, l and 5 the member 7 is the receiving member, the spring collar 6' the entering member, while the numeral 3 indicates the pipe .or member to which the entering memher is connected. The internal diameter of the members 7 and 3 is preferably the same, although one of the principal advantages of the present invention is that the receiving member may have various diameters within a limited range without materially afiectingthe operation of the device. The entering member or collar 6 is formed of spring material such as steel or spring brass, said collar being in the form of a split'tube. Oneend of the collar is in serted into the member 8 and a rivet 8 is employed to hold said collar in fixed position within said member and in close engagement with the inner wall of the same. Said rivet is so located as to pass between. the edges of t-h'e .cleit in'the collar and is of sufficient diameter to engage the said edges of the collar along the cleft and expand said collar sutliciently to cause it to very snugly engage the inner wall of the member 3. it is preferable to verv slightly notch the collar on each of the edges of the cleft where the rivet passes through so as to provide against any longitudinal movement'of said collar.. In case the edges are so notched the rivet should still be of suflicient diameter to expand the collar as just above described. By so expanding the collar by means of the rivet said collar is caused to so closely engagethe inner wall of the member 3 as to produce a tight joint. The rivet 8 is the only means of connection between the collar 6 and member 3, said collar preferably, butnot -necessarily, extending into the member 3 a distance substantially equal to twice'the diameter of said member, and the rivet 8 located, well back toward the inner end of said collar. gives a more substantial and rigid connection between the member 3 and collar 6. The cleft in the collar 6-at its outer or entering end is expanded or made wider so that the external diameter of the collar at the end will normally be greater than the internal diameter of the receivingmemdisconnected.

said pipe, the

enter the member 7. 5o.

' be noted that her into which it is adapted to be inserted. It should also be stated that while the projecting end of the collar is flared or sprung to a 'greater diameter, the entire collar from end to end before attachment to the member 3. is sprung so as to have an" external diameter greater of the pipe 3 and is forced into place in said collar thus having a tendency to press outwardly and hug the inner side of the pipe 3.

At .the extreme outer end of the collar 6 the said collar is externally tapered or drawn inwardly as'at 9 to assistin the 0 er ation of coupling. When it is desire to couple the members 3 and 7 it is only neces sary' to insert the projecting end of the collar into said member 7. In doing this it is usually desirable to at firsthold the receiving member and the collar at a slight angle to each other, which, together with the beveled edges at9, will assist materially in crowding or reducing the flared end of the collar to such diameter as to permit it to In Fig. 3 the dotted lines extending from the member 7 tothe end of the collar 6 show that the internal diameter of the member 7 is less than the external diameter of the collar 6 when it is When the connection has been made as in Fig. 4, where the member 7 is slipped upon the collar 6 sufliciently. to abut against the end of the pipe 3, it will ciently contracted so that the width of the cleft-in said collar is substantially the same from end to end. It will be understood that because of'its spring act-ion the collar will This than the internal diameter the collar 6 has been suflia first, intcrnall through the nozzles and connections of different kinds are employed and it is desirable to change these nozzles and connections more or less frequently as the character of the work may demand. While it is possible to provide all of such. nozzles and connections with receiving members of exactly the same internal diameter, yet as a matter of practical manufacture there usually is a slight variation in this diameter among the different nozzles and connections. If this difference amounts to but an extremely small fraction of an incl-1 it will produce unsatisfactory results including loose nozzles and joints if an ordinary slip joint be employed. Vith my invented device,however, the entering memher or collar, in the operation of coupling, is contracted only suiiiciently to enter the receiving member Whatever its exact in ternal diameter may be, andthe spring action of said collar upon the wall of the receiving member serves to keep the parts in place and maintain a tight and rigid joint. The superiority of my construction, from a commercial standpoint, the standpoint of the manufacturer and that of the user will therefore be readily apparent, as no trouble will be experienced in making the necessary connections. and the receiving members need not be made to an absolute standard of internal diameter. Heretofore nozzles and similar devices have frequently been con nected by means of a coupling comprising a tapered entering member and a correspondingly tapered receiving member. When connection is made in this manner the parts frequently work loose with but slight use and give considerable annoyance. In other cases the well known screw thread coupling 115 has been employed, but with considerable dissatisfaction because of the slow and unhandy operation of coupling required. In

the-coupling herein described all of these and similar undesirable features are absciilt, 120

and a substantial, tight and sufficiently rigid joint can readily be made.

claim 1. A detachable pipe coupling comprising cylindrical member rovided with a. girojecting, internal, split, spring collar, said collar connected to said first member by fastening means extending wall of said first member and cleft of said collar and an in- 130 through the ternally cylindrical receiving member having Substantially the same internal diameter as said first member, said collar having its outer end expanded so that its external diameter is normally greater than the internal diameter of the receiving member, said outer end adapted to be contracted so as to permit its entering the receiving member, whereby said receiving member and said first member may be detachably coupled.

2. A -detachable pipe coupling comprising a first, internally cylindrical member provided with a projecting, internal, split, Spring collar, said collar connected to said first member by fasteningmeans extending through the wall of said first member and through the cleft and the edges of the cleft of said collar and an internally cylindrical receiving member having substantially the same internal diameter as said first member, said collar having its outer end expanded so that its external diameter is normally greater than the internal diameter of the receiving member, said outer end adapted to be contracted so as to permit its entering the receiving member, whereby said receiving member and said first member may be A detachably coupled.

3. A detachable pipe coupling comprising a first, internally cylindrical member and a second, internally cylindrical member, the internal diameters of said members being substantially the same, said first member provided with a collar made of spring ma terial in the form of a split tube, one end of said collar inserted into the first member,

- fastening means connected to said first memher and extending between the edges of the cleft insaid collar, said collar so formed that the cleft in the projecting portion -is normally of-greater width than the cleft in that portion of said collar Within the first member, whereby the diameter of said projecting portion is normally greater than the internal diameter of the said second member, and said projecting portion adapted to be reduced in diameter by forcing the edges of the cleft toward each other, whereby said projecting portion may be slidably inserted within said second member.

4, A detachable pipe coupling comprising .a first, internally cylindrical member provided with a pro ecting, internal, split, s ring collar, said collar connected to said irst member by fastening means extendin through the wall of said. first member an through the cleft of said collar, said fastening means holding the edges of said cleft apart to cause said collar to hug the inner wall of said first member, and an internally cylindrical receiving member having substantially the same internal diameter as said first member, said collar having the edges in the cleft of its outer, projecting portion spaced from each other to expand said col lar in said projectingportion so that its external diameter is normally greater than the internal diameter of the receiving member, and said outer endadapted to be contracted so as to permit its entering the receiving' member, whereby said receiving member and said first member may be detachably coupled.

5. A detachable pipe coupling comprising a first, internally cylindrical member provided with a pro ecting, internal split, spring collar, said collar connected to said first member by fastening means extending through the cleft of said collar, said fastening means holding the edges of said cleft apart to cause said collar to hug the inner wall of said first member, and an internally cylindrical receiving member having substantially the same internal diameter as said first member, said collar having the edges in the cleft of its outer, projecting portion spaced from each other to expand said collar in said projecting portion so; that its external diameter is normally greater than the internal diameter of the receiving memher, and said portion adapted to be contracted so'as to permit-its entering the receiving member, whereby said receiving member and said first member may be detachably coupled.

In testimony that I claim the above, I have hereunto subscribed my name in the presence of two witnesses.

- FRANCIS MILLS lease. 

